Compilare: user.cpp: In function ‘int main()’: user.cpp:33:9: warning: unused variable ‘i’ [-Wunused-variable] int i,c=0; ^ user.cpp:33:11: warning: unused variable ‘c’ [-Wunused-variable] int i,c=0; ^ user.cpp:34:15: warning: unused variable ‘r’ [-Wunused-variable] long long r,n,p,prod,b; ^ user.cpp:34:19: warning: unused variable ‘p’ [-Wunused-variable] long long r,n,p,prod,b; ^ user.cpp:34:21: warning: unused variable ‘prod’ [-Wunused-variable] long long r,n,p,prod,b; ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("algebra2.in","r",stdin); ^ user.cpp:32:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("algebra2.out","w",stdout); ^ user.cpp:35:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^